The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological implications of the large-scale two-point correlation function
Sánchez, Ariel G., Scóccola, C. G., Ross, A. J., Percival, W., Manera, M., Montesano, F., Mazzalay, X., Cuesta, A. J., Eisenstein, D. J., Kazin, E., McBride, C. K., Mehta, K., Montero-Dorta, A. D., Padmanabhan, N., Prada, F., Rubiño-Martín, J. A., Tojeiro, R., Xu, X., Magaña, M. Vargas, Aubourg, E., Bahcall, N. A., Bailey, S., Bizyaev, D., Bolton, A. S., Brewington, H. et al. 2012. "The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological implications of the large-scale two-point correlation function." Monthly Notices of the Royal Astronomical Society 425:415-437. https://doi.org/10.1111/j.1365-2966.2012.21502.x
We obtain constraints on cosmological parameters from the spherically averaged redshift-space correlation function of the CMASS Data Release 9 (DR9) sample of the Baryonic Oscillation Spectroscopic Survey (BOSS). We combine this information with additional data from recent cosmic microwave background (CMB), supernova and baryon acoustic oscillation measurements. Our results show no significant evidence of deviations from the standard flat ? cold dark matter model, whose basic parameters can be specified by ?m = 0.285 ± 0.009, 100 ?b = 4.59 ± 0.09, ns = 0.961 ± 0.009, H0 = 69.4 ± 0.8 km s-1 Mpc-1 and ?8 = 0.80 ± 0.02. The CMB CMASS combination sets tight constraints on the curvature of the Universe, with ?k = -0.0043 ± 0.0049, and the tensor-to-scalar amplitude ratio, for which we find r = -0.0043 ± 0.0049, and the tensor-to-scalar amplitude ratio, for which we find r s??DE = -1.033 ± 0.073 when this parameter is assumed time-independent, and no evidence of a departure from this value when it is allowed to evolve as wDE(a) = w0 wa(1 - a). The achieved accuracy on our cosmological constraints is a clear demonstration of the constraining power of current cosmological observations.
